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Finding the Fourth Proportional to 603,142.40, 904,713.95 and 378,660.51

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Solution

The fourth proportional to 603,142.40, 904,713.95 and 378,660.51 is: 567,990.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,142.40 : 904,713.95 = 378,660.51 : x
  2. Step 2: Convert to fraction form
    603,142.40/904,713.95 = 378,660.51/x
  3. Step 3: Cross multiply
    603,142.40x = 904,713.95 × 378,660.51
  4. Step 4: Simplify right side
    603,142.40x = 342,579,446,657.77
  5. Step 5: Solve for x
    x = 342,579,446,657.77/603,142.40
  6. Step 6: Final answer
    x = 567,990.98

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.